OK, Hornady's 8th edition gives the following info for the. 44 magnum:
All loads listed are maximum!!!
Rifle data-Hornady/Frontier case, Winchester large pistol primer(does not state magnum), 300gr. XTP bullet, 18.4grs H110 for velocity in the 1,400fps range from a 18" barreled Ruger carbine. COAL-1.600"
Pistol data- Hornady case, Winchester large pistol primer, 300gr. XTP bullet, 20.1 grs. H110 for velocity in the 1,200 fps range from a 7.5" Ruger Redhawk. COAL-1.600".
Also listed is data for the .44 Magnum in the T/C Contender; Same components, max charge H110 under the 300XTP is 19.8, getting things into the 1,400 fps range from a 14" barrel.
